[PATCH 4/4] usb: renesas_usbhs: add extcon notifier to set mode for non-otg channel

[Yoshihiro Shimoda]

This patch adds extcon notifier callback to set the mode of
host/peripheral by using extcon state (e.g phy-rcar-gen3-usb2) for
non-otg channel (e.g. R-Car D3).

Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda...@renesas.com>
---
 drivers/usb/renesas_usbhs/common.c |  9 +++++++++
 drivers/usb/renesas_usbhs/common.h |  1 +
 drivers/usb/renesas_usbhs/rcar3.c  | 11 +++++++++++
 3 files changed, 21 insertions(+)

diff --git a/drivers/usb/renesas_usbhs/common.c 
b/drivers/usb/renesas_usbhs/common.c
index 56079bb..c5289b3 100644
--- a/drivers/usb/renesas_usbhs/common.c
+++ b/drivers/usb/renesas_usbhs/common.c
@@ -581,6 +581,15 @@ static int usbhs_probe(struct platform_device *pdev)
                break;
        case USBHS_TYPE_RCAR_GEN3_WITH_PLL:
                priv->pfunc = usbhs_rcar3_with_pll_ops;
+               if (!IS_ERR_OR_NULL(priv->edev)) {
+                       priv->nb.notifier_call = priv->pfunc.notifier;
+                       ret = devm_extcon_register_notifier(&pdev->dev,
+                                                           priv->edev,
+                                                           EXTCON_USB_HOST,
+                                                           &priv->nb);
+                       if (ret < 0)
+                               dev_err(&pdev->dev, "no notifier registered\n");
+               }
                break;
        default:
                if (!info->platform_callback.get_id) {
diff --git a/drivers/usb/renesas_usbhs/common.h 
b/drivers/usb/renesas_usbhs/common.h
index 6479778..c9747f0 100644
--- a/drivers/usb/renesas_usbhs/common.h
+++ b/drivers/usb/renesas_usbhs/common.h
@@ -249,6 +249,7 @@ struct usbhs_priv {
        struct platform_device *pdev;
 
        struct extcon_dev *edev;
+       struct notifier_block nb;
 
        spinlock_t              lock;
 
diff --git a/drivers/usb/renesas_usbhs/rcar3.c 
b/drivers/usb/renesas_usbhs/rcar3.c
index b9a8453..d657309 100644
--- a/drivers/usb/renesas_usbhs/rcar3.c
+++ b/drivers/usb/renesas_usbhs/rcar3.c
@@ -112,6 +112,16 @@ static int usbhs_rcar3_get_id(struct platform_device *pdev)
        return USBHS_GADGET;
 }
 
+int usbhs_rcar3_notifier(struct notifier_block *nb, unsigned long event,
+                        void *data)
+{
+       struct usbhs_priv *priv = container_of(nb, struct usbhs_priv, nb);
+
+       usbhs_rcar3_set_usbsel(priv, !!event);
+
+       return NOTIFY_DONE;
+}
+
 const struct renesas_usbhs_platform_callback usbhs_rcar3_ops = {
        .power_ctrl = usbhs_rcar3_power_ctrl,
        .get_id = usbhs_rcar3_get_id,
@@ -120,4 +130,5 @@ static int usbhs_rcar3_get_id(struct platform_device *pdev)
 const struct renesas_usbhs_platform_callback usbhs_rcar3_with_pll_ops = {
        .power_ctrl = usbhs_rcar3_power_and_pll_ctrl,
        .get_id = usbhs_rcar3_get_id,
+       .notifier = usbhs_rcar3_notifier,
 };
-- 
1.9.1

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